City of Fallen Angels is the fourth book in The Mortal Instruments series by Cassandra Clare.

[2][3][4] City of Fallen Angels is the fourth installment in the Mortal Instruments series.

Simon receives an offer from Camille Belcourt, a vampire who claims to have been usurped by Raphael Santiago.

At home, his mother confronts him about the blood she has found hidden in his closet, and he is forced to tell her what he has become.

Knowing that he cannot go back to his mother's house, he moves in with his band's new member, Jordan Kyle.

Clary and her mother Jocelyn also discover that someone is trying to create more demonic children like Sebastian when they see a baby with clawed hands and black eyes at the hospital.

While performing at a concert, Simon runs off stage, ill from lack of blood consumption.

The following day, they receive a message saying someone is holding Simon's girlfriend hostage, and he should go save her.

The Silent Brothers reveal the nightmares are due to his vulnerability to demonic influence, after Jace was resurrected by the angel Raziel.

Wanting to perform the ritual again to give him the protection, the Brothers make Clary leave.

With his blood, Max, who is actually the demon Lilith, draws a rune on his chest which puts him under her influence.

Isabelle, Alec, Maia, and Jordan follow Simon to the address on Satrina's business card they found in his wallet.

She then goes to the lobby to meet her mother, Luke, Simon, Maia, Alec, Magnus, and Isabelle, promising to come back in five minutes.

The Manila Bulletin gave a mixed review, writing that, "when it departs from Simon's story is when it is at its most weakest".

[5] Common Sense Media gave the book four stars and wrote "Exciting entry in bestselling series has creepy cult stuff.